This FDA-approved Air Flow Purifying Respirator is specifically designed to combat microparticles and microorganisms up to 0.26µm, including bacteria, viruses, smoke, dust, and mold. The air intake fan pulls filtered air through the mask with three speeds to fit your breathing style, a replaceable filter that meets N95 standards removes harmful particles from the air, and an additional outer washable cloth mask goes around the outside to complete a discreet look so you blend right in with the crowd. In fact, you can use it with a variety of other face coverings, like a bandana or anything that can hold it properly in place. There are lots of existing PM2.5 masks on the market, but they are not generally designed to combat microorganisms—particularly if used over and over without washing or replacing the filters. Even with effective protections, the number of impurities (including viruses) that can be blocked per square centimeter of a filter is limited, so filters need to be replaced daily to maintain effectiveness. TOKK Air Flow provides two layers of protection—an outer washable layer like conventional cloth masks and a disposable internal filter—that improves efficacy and effective protected life span. The main unit is also made of medical grade water-based silicone, which can be sterilized for re-use. This respirator is designed with comfort for all users in mind, including a fit for all face shapes and size. The built-in fan not only draws in clean air and expels CO2, it lowers temperatures around the nose and mouth and reduces humidity within the mask by up to 40%. The fan is conveniently powered by a long-lasting rechargeable battery that provides up to 8 hours of continuous use per charge.It’s even great for exercise! The fan makes it far easier to breath than conventional mask, allowing you to exercise to a high level of exertion and maintain your safety. Weighing just 3.88 ounces, you’ll barely even notice that you’re wearing it. Note: Before purchasing, please check with local guidelines and recommendations to see if this product is suitable for your intended use.